Search found 925 matches

by T1 Terry
Thu, 03 Mar 2011, 02:18
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

Terry, I have a concern that you are placing more emphasis on the 600A regen than it deserves. You won't get it that often and certainly not for long. 57kW of regen sounds a bit painful. What are you trying to stop? 10 tonnes of motorhome or actually converted bus. 11mtrs long, 3.8 mtrs high and ro...
by T1 Terry
Wed, 02 Mar 2011, 18:04
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

Quite right Johny, sort of thinking in print to get some sort of balance to the project and get peer feed back from those with a lot more clues on this stuff before I dive in. My first thoughts were toward an electro magnetic retarder but then I looked to a method of capturing that waste energy and ...
by T1 Terry
Wed, 02 Mar 2011, 17:07
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 88457

EV2Go's - Lithium Powered Trike

There's always more than one way to skin a cat but there's also an easy way and a hard way. The torque wrench on the plate bolted to the coupling would still work, a suitable rated torque wrench can be hired cheaply. Doing the bolts up and undoing them later from the diff end would be a long slow pr...
by T1 Terry
Wed, 02 Mar 2011, 11:59
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 88457

EV2Go's - Lithium Powered Trike

I'll try to explain my idea further. http://forums.aeva.asn.au/uploads/350/Coupling06.jpg Picture a plate a the thickness a little less than the head section of the Ubrako bolts, the hex cut out of the centre to fit the outer of the Transtorque and cut to the outer diameter of the coupling. Holes fo...
by T1 Terry
Wed, 02 Mar 2011, 00:11
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 88457

EV2Go's - Lithium Powered Trike

The bolts are already through the coupling as you slide the motor and torque tube onto the diff. The bolts are located and tack welded to a plate at the motor end so they can't spin and some form of retainer like a circlip stops the plate from sliding back toward the motor. This way the threaded sec...
by T1 Terry
Tue, 01 Mar 2011, 23:55
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

Just for the exercise I went through the numbers, to absorb 600amp regen @ 96v would require 2112 cells, @ $7.99 = $16874.88 plus freight from the states, maybe not. They do have a 4C recharge and 30C discharge spec though.

T1 Terry
by T1 Terry
Tue, 01 Mar 2011, 20:36
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 39315

seligtype3 1969 Volkswagen Type 3

Maybe a Davis Craig heater booster pump to circuilate water through the controller and it could offer at least a bit of warm to take the chill off inside in nasty part of winter. I use one to circulate water around a loop of copper pipe hung under one side of the kombi exhaust to heat the water for ...
by T1 Terry
Tue, 01 Mar 2011, 19:37
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 39315

seligtype3 1969 Volkswagen Type 3

Won't heat be an issue? There are some very nive air vents that feed in from each side already there so some adaption the these would help. Is the controller air cooled or water cooled?

T1 Terry
by T1 Terry
Mon, 28 Feb 2011, 23:07
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 330668

Weber and Coulomb's MX-5

Image
Now there's someone who does use a hammer very often Image love the white overalls too.

T1 Terry
by T1 Terry
Mon, 28 Feb 2011, 22:50
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

The TS specs list max charge current 3C at -45degc to +85degc. If regen is equal to max motor amps I could need the batteries to absorb up to 600amps without the terminal voltage climbing to cell destruction. The Headway cells look great for 600amp draw with 5C capability I need 12 in parallel x 32 ...
by T1 Terry
Mon, 28 Feb 2011, 21:33
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

Thanks Johny,
That's the bit I was after "Max charging current 2C", bugga, continue searching. Regen is going to be my biggest problem by the look of it.

T1 Terry
by T1 Terry
Mon, 28 Feb 2011, 21:26
Forum: General EV Discussion
Topic: Blade EV - New model
Replies: 104
Views: 14007

Blade EV - New model

If they can build an electric Commodore that out launched the FPV and HSV units and gave them a scare down the 1/4 mile they would e on the showroom floor within 2 yrs, that's just the way the general perception is. At the moment Mr & Mrs general public still see an electric vehicle as a never read...
by T1 Terry
Mon, 28 Feb 2011, 20:58
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

I.E. won't let me view that link, said it was trying to down load files or something.

T1 Terry
by T1 Terry
Mon, 28 Feb 2011, 20:55
Forum: Batteries, charging, management and monitoring
Topic: Lithium Sulfur Batteries
Replies: 57
Views: 11456

Lithium Sulfur Batteries

According to Jack Rickard TS have told him they would have batteries available to him mid next year for his latest monster project. Still not sure how much strength to place on any of that but time will tell.
Were they lithium sulphur the power cells that were used in the Mars explorer?

T1 Terry
by T1 Terry
Mon, 28 Feb 2011, 20:35
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

Hi Johny, I've been trying to find spec sheets for Headway cells but I must be looking in the wrong places. It appears the A123 cells are unobtainium unless you buy heaps of electric drill packs and pull them to pieces, that doesn't sound cost effective. The Headway cells seems a little blurred too,...
by T1 Terry
Sun, 27 Feb 2011, 13:13
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 39315

seligtype3 1969 Volkswagen Type 3

A mix of Valvoline Tectyl, fishoil and diesel will make a far better rust proofing agent than tar. 50% Tectyl, 50% fishoil and a further 10% by volume of diesel, best to add the diesel just before you plan to spray it to avoid evaporation and settling. I used a body shultz gun and emptied the body s...
by T1 Terry
Sat, 26 Feb 2011, 05:52
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

call it 115 kW electrical, or 157 A for a 730 V nominal pack, which is 4C). Of course, the pack will sag to way less than nominal, so we'll probably need around 6C peak. We're hoping that peaks of 6C won't reduce the life of the pack too much. If the TS 40ah batteries are rated at 0.5C standard (se...
by T1 Terry
Sat, 26 Feb 2011, 02:17
Forum: Batteries, charging, management and monitoring
Topic: How low do you go?
Replies: 22
Views: 2210

How low do you go?

I'm trying to gauge how required battery capacity is calculated by different people. Is it the peak amp draw, enough capacity to supply demand at the cells peak discharge rate? If yes, which rate, constant current or impulse current? Do you allow a safety margin or push the boundaries? Is it requir...
by T1 Terry
Sun, 20 Feb 2011, 13:42
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4199

Lead acid battery selection

C/4 = 0.25C is quite far from savage discharge (actually its almost bang on ideal). Bugga, have I been caught by non consistant quoting of measurement methods again, so C/4 is the capacity divided by 4. They must have been testing very small capacity batteries to to get 2 full discharge cycles @ 0....
by T1 Terry
Sat, 19 Feb 2011, 20:12
Forum: General EV Discussion
Topic: Blade EV - New model
Replies: 104
Views: 14007

Blade EV - New model

80% Australian made from local and imported ingredients Image

T1 Terry

by T1 Terry
Sat, 19 Feb 2011, 17:38
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 38076

4Springs' Brumby

I also need to get a flange made to adapt between the drive shaft on the motor, and the 8 bolt holes on the flywheel Are you planning to use the flywheel with the electric motor? Are you keeping the clutch? The flywheel can be machined down to the diameter of the pressure plate and the back machine...
by T1 Terry
Sat, 19 Feb 2011, 02:41
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4199

Lead acid battery selection

I was of the understanding that one crook cell was the end of the entire battery. So that all 12 (12V) batteries would need to be disposed of if one collapsed? If one “cell” collapses and you catch it in time the rest of the cells that make up the whole battery can be saved. (I.E. It takes 12 12v b...
by T1 Terry
Fri, 18 Feb 2011, 13:12
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4199

Lead acid battery selection

There is a CSIRO test paper on the battery energy cells, I think it was Dr David Brown that I communicated with there, he was going to send me a more detailed report on these cells but basically they are reported to handle savage discharge and recharge regimes without falling over from an early deat...
by T1 Terry
Fri, 18 Feb 2011, 03:43
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4199

Lead acid battery selection

This is going to sound like a retrograde step but if you must use lead acid batteries I'd recommend flooded cell batteries. They are high maintenance and messy but they can be cell tested and equalised much easier than AGM batteries. If you have the room use multiple 6v rather than 12v units, one cr...
by T1 Terry
Thu, 17 Feb 2011, 13:20
Forum: Electric motors and controllers
Topic: EV kits
Replies: 4
Views: 1593

EV kits

Good find, thanks. I've sent off an inquiry regarding a motor and controller, the water cooled 48v AC with regen was very appealing. It looks like a Curis controller in their photos. The twin motor unit looks very interesting, it would be the answer for direct drive trans axle applications with it's...